基于MMSE准则的参数法时域信道估计  

Parameter Method for Channel Estimation Based on MMSE in Time Domain

作　　者：洪露[1] 王辉[1] 

机构地区：[1]南京工业大学信息科学与工程学院,江苏南京210009

出　　处：《通信技术》2010年第1期38-39,42,共3页Communications Technology

摘　　要：在OFDM系统中,实时、准确地得到关于信道的信息,已成为数据检测和信道均衡的关键。文中在基于DFT方法上,提出了一种基于MMSE准则的参数化信道估计方法,利用了信道时域响应的特性,对信道时域响应进行了估计。仿真结果表明,此方法较迭代的DFT方法更快捷,更充分地利用了信道时域响应的特性,在高信噪比时,有更低的均方误差(MSE)。In OFDM system, real-time and exact channel information is the key point to signal detection and channel equalization. This paper, based on MMSE principle, proposes a parameter method for channel estimation. This method, by using the characteristics of channel time domain response, estimates the channel time-domain response. Computer simulations show that the proposed algorithm, as compared with conventional DFT algorithm, could achieve faster estimation and make more fully use of the characteristics of channel time-domain response, and has lower mean square erro （MSE） when the signal-to-noise ratio is high.

关 键 词：正交频分复用技术 信道估计 时域滤波 MMSE LMS 

分 类 号：TN911[电子电信—通信与信息系统]